Automatic reverser



Dec. 11 1923. 1,476,793

S. BERG ET AL AUTOMATIC REVERSER Filed March 30, 1922 2 Sheets-Sheet 1 Dec. 11 1923. 1,476,793

k I S. BERG ET AL AUTOMATI C REVERSER Filed March so. 1922 2 Shets-Sheet a \B Q *1 w( V n 4 4! m j & W K x N if.

Q ndentam Fig. 6.

i 4 Fig. 4.

Patented Dec. 11 1923. I

UNITEDsT ATES $IMONBERG AND Brennan 0. BERG, or person, MICHIGAN, Assienons 'ro MIoHr en s'r ann. TUBE rnonoors COMPANY, or.

or MICHIGAN.

PATENT orrice;

DETROIQYMICHIGAN, A CQBPOBATI N AUTOMATIC nnvnasnn.

Application filed MarchBO, 1922. Serial Noi 547,976.

To all whom, it may ooncem Belt known that SIMO B RG and R GH- ARI) 0-13am, citizens of the United States, residing at Detroit, in the county of Wayne and 'State of Michigan, have invented certain new and useful Improvements in Auto- .matic Bevers'ers, of which the following isa specification. f i

This invention relates 'to an automat reverser and is. especially designed as an automatic feed reversingdeviceifor' a drill press. In the drawings: a 1

- Fig; 1 is a front elevation of a portion of a drill press spindle, the drill press feeding shaft and the automatic reverser housing.

Fig.2 is an elevation of the reverser with the cover plate removed.

Fig. 3 is aninside elevation of the cover plat I s Fig. at is a fragmentary section showing the driving lug and releasingcam. I

IFig. 5 is afsectionv on the line 55 of ig. ,6 is an'elevation of the reverser with the cover'plate in place.

Fig. 7 is a sect on on the line 77 of A drill press is ordinarily provided with a rotating spindle a (Fig. 1) which carries the drill or other tool not shown). This spindle is provided with a pair of collars Z1 and .0. Between these collars is a yoke ,al

' secured loosely around the driving spindle by theclamp e. This yoke is'a rack carrier. This racky engages with the pinion 2 on the shaft 7 (Fig. 7 consequently when the shaft f is rotating the rack is caused to travel downwardly and carry the rotating drill spindle with it, pressing the drill or tool into the work.

\Vhen the driving connections are released, a counter balancing spring 21(Fig. 7) con nected with the cup h and acoun'ter weight (not shown) attached by the chain 9 to the rack support serve to. turn the shaft in Return movement. This is'zcominon con- ,struction indrill presses, In the. ordinary semi-automatic reed reverser it is necessary o g n act te he e s g de i e by hand before it will again start to-feed. Ordinarily this is a ballclutch proposition.

In our construction we employ'a" feeding spindle i which is provided with a worm j,

mental slots so that when the same is bolt-- ed to the housing 7" by the cap screws 3, an

djus m nt-i poss le y e i g the p screws- The position "of the cove-r plate and consequently the, position of the reversing cam 0 can be altered, This will alter the depth to which the feeding device will feed the drill-press spindle before reversing.

The operation is simple. The worm j drives the largeworin wheel '70 at a very much reduced speed, the driving lug m engages the arm t, which is connected by keys with shaft f. This, of course, establishes a driving connection between the feeding spindle z and the rack operating shaft 7. This driving coupling will continue until the driving lug m reaches the earn 0 as shown in Fig. 4.- Cam 0 is in the path of the chamfered cornern of the driving lug and consequently as the two beveled surfaces of the cam and. the driving lug engage the driving lug isforced into its socket until it passes beyond the arm 6. Hence the arm 25 is re: leased, the coiled counter balancing spring 2 and the counterweight serve to immediately return the raclcand the rotating drill spindle to their initial position The spindle i continues to rotate as does also the the spindle l3 and by turning the spindle the arms15 climb the cain surfaces l4 and can restin' the slight depressions 16. This withdraws the lug m from the path of the cam 0 and allows the operation of the shaft fby hand. I V V ii hat we claim is 31. In an automatic reverser; thecomhination of ad'riving ivh'eel, a shaft, means for returnii'ig the shaft in rotative movement it has been actuated in a forward teedmoveinent, driving connections between the-crivi'ng wheel and the shaft comprising a driving lug provided witha chamfered i'aeeand a driving arinarranged to he carried forward by saidlug when projectedand spring for normally projecting said lag,

and ajcain interposed in the-path of said withdrai chanife ed surface'of the lugto temporarily dieing from tliefi ace o'f the driving ivhe e'lto peri'nit'the said lug to advance ahead of thedriving arm to temporarily release the driving connections to permit the returner the shaft, while the driving lug is again-promoted to p ck up the driving arm 23' theappo'i'nte'd time.

7 .2.' In an automaticreverser,the combination' of a driving wheel, a shaft, a driving warm secured-thereon, means for returning the shaft in return movement when the driving conin-zctionswith the driving wheel are released, the'said driving connections'between the said wheei and shatt'including a dr fing' lug carried by the driving whee-l arranged toengatge said driving a r n,. and' nea-ns for temporarily releasing the driving arm from therdriving lug to permit the returning nieansto rotate the shaft inreturnmovement I placewhereby the lug again engages the arm to r .couplc up theshaft indirect driving rela I tion after {the returnnovelnent has taken in an automatic reverser, the combina- "'tio'n ofadriving wheel, a shaft, means for rotating the shaft in return movement when the forward-driving connections are released,

77 .aspringgvressed plunger or driving lug proeeting jrroin' theda-ce'or' the driving wheel normally, 1 means. 0y which the spring pressed plunger may be withdrawn and locked in withdrawn position and: a cam in theipath fof the'spring pressed plunger by which the said plunger may be withdrawn, a driving arm on the shaft the said drivilw. arm and V "springpressed piun'ger; when in its projectg position 'arranged' so that theplunger drives the shalt until it encounters the cam whereupon the plunger is temporarily released to permit it to advance ahead of the driving arm, which permits the return movement of the shaft and allows the plunger to again project and pick up the driving arm.

4-. in an automatic revcrscr, the combinalion of a shaft, 3 member for driving said shaft in rotation, connections between said member and the shaft including a driver and a driven member secured to the slia it, means for temporarily displacing the driver to permit the same to advance ahead of the driven member, and means for automatically rotating the shaft in reverse movement when this action takes place.

In; an automatic rcverser, the combination of a shaft, :1 member for rotating the shai' connections between the shaft-and rotating member including a driving connection and a driven connection, means for temporarily, displacing one of said conneutions'l'o pcrmitthc driving connection to advance ahead of the driven connection, said means being iuljustable'as to position to thereby vary the feed movement and means for driving the shaft in reverse movement when the driving connection advances ahead of the driven connection.

G. In an in omatic revcrscr, the combination of a driving wheel, a shaft, means for driving the shalt in return movement when its forward driving connections are released, said forward driving connections including a driving lug carried by the driving wheel to connect with the shaft to rotate the same forward, a cover plate provided with a cam which may be adjustcd in varying positions and which serves to release the driving lug :irom connection with said. shaft tem )orarily to permit the return movement of the shaft but which allows the. re-engagemcnt of the driving connections to again rotate the shaft forward.

7. 1n an automatic rcverser, the combination of a driving wheel, a driving lug carried by the driving wheel, a shaft connected with said driving lug to drive the shaft, in a forward driving movement, means for returning the shaft in 'a return movement when the same is released from the forward driving connection, means for temporarily releasing the driving lug from driving connection with the shaft to permit the operation of the snail: returning means but permitting the driving lug to again pick up connect ioirwitli the shaft automatically.

8. In an automatic reverscr, the combination of a, driving wheel, a shaft, means for rotating the shaft in return movement when its forward driving connections are released, the-driving connections consisting of a driving member carried by the driving wheel arranger. to connect with the shaft, means for withdrawing the driving member and locking the same in withdrawn position, and her with the shaft to again feed the shaft in means for engaging the driving member a forward driving movement at the appointwhen in its projecting position for temporaried time. 10 1y releasing the driving member from eonnecln testimony whereof we aflix our signa- 5 tion with the shaft to permit the return tures. movement of the shaft and which means also RICHARD O. BERG. permits a reconnection of the driving mem- SIMON BERG. 

